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Debt - Summary of Interest Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |
Interest expense | $ 4,481 | $ 3,413
Accretion of debt discount - issuance costs | 1,913 | 686
Accretion of debt discount - warrants | 1,029 | 1,457
Convertible notes |  |
Debt Instrument [Line Items] |  |
Interest expense | 1,111 | 722
2021 Promissory Note |  |
Debt Instrument [Line Items] |  |
Interest expense | 203 | 0
Senior Convertible Note |  |
Debt Instrument [Line Items] |  |
Interest expense | 0 | 197
Factoring financing agreement |  |
Debt Instrument [Line Items] |  |
Interest expense | 75 | 175
All other debt and financing obligations |  |
Debt Instrument [Line Items] |  |
Interest expense | $ 150 | $ 176

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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399 + Details
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